.face_box {
    width: 555px;
    height: 455px;
    text-align: center;
    line-height: 455px;
    float: left;
    position: relative;
}
.face_box img{
	position: absolute;
    left: 10px;
    top: 13px;
    z-index: 1;
    opacity:0.6;
}

.face_box #video {
    width: 533px;
    height: 432px;
    position: absolute;
    left: 10px;
    top: 13px;
    transform: rotateY(180deg);/* 摄像头镜面反转 */
    -webkit-transform: rotateY(180deg);    /* Safari 和 Chrome */
    -moz-transform: rotateY(180deg);
}

.face_box #canvas {
    width: 533px;
    height: 432px;
    display: none;
    position: absolute;
    left: 10px;
    top: 13px;
}